Compressor valve



Nov. 4, 1941. KQWAQZ 2,261,886

COMPRESSOR VALVE Filed Sept. 21, 1940 2 Sheets-Sheet l Nov.4,1941. J, F, KOWACZ- 2,261,886

COMPRESSOR VALVE I Filed Sept. 21, 1940 2 Sheets-Sheet? 3mm 530 2 EMKozuac Patented Nov. 4, 1941 COMPRESSOR VALVE Joseph Frank Kowacz, Regina, Saskatchewan,

Canad Application September 21, 1940, Serial No. 357,81 1

3 Claims.

This invention relates to compressor valve structure and in particular to compressor outlet valve structure. Objects of the invention are to provide a light and efiicient'valve particularly suitable for use in high speed machines, to provide improved guide means for the valve, to provide an arrangement wherein parts subjected to the greatest wear are readily replaceable, and to provide an improved breather arrangement for the guide means. The manner in which thes and other objects are accomplished will be described with reference to the accompanying drawings which show the invention in illustrative embodiment. In the drawings:

Figure l is a section on line of Figure 2 of valve structure in accordance with the invention;

Figure 2 is a section substantially on line 2--2 of Figure 1;

Figure 3 is a section substantially on line 33 of Figure 1;

Figure 4 is an enlarged view partly in elevation and partly in section of a valve and valve guiding means appearing in Figures 1 and 2, and

Figure 5 is an axial section of the valve and valve guiding means.

Referring to the drawings, the valve cage comprises a cylindrical block I0 provided, as here shown, with five symmetrically disposed through openings ll. Each opening, as shown in Figure 1, comprises a cylindrical upper portion I2, a conical bottom shoulder I3 of which the portion l4 comprises the valve seat, and a cylindrical extremity l5.

The valve guiding means, generally designated by th reference numeral l6, comprises inner and outer cylindrical members l1 and I8 which are threaded together at their upper ends, at l9, in concentric relation with a narrow annular space 20 between them. Member I8 is provided with external axially extending ribs 2| which project below the cylindrical portion and have inclined ends complementary to the inclination of the shoulder l3. The lower extremities of the ribs 2| have inner surfaces flush with the inner walls of the cylinder.

The inner member 11 is provided with an end wall 22 which has a central breather hole 23. Beneath wall 22 the bore of member I! is restricted at 24 so as to engage and retain one end of a, compression pring 25 which bears against wall 22.

Reference numeral 26 designates a cup-shaped valve having an imperforate head 2'! and a cylinsliding fit, both inside and out, in the annular I space 20. The lower end of'spring 25 bears against the head 21, and the latter has a conical portion 29 for cooperation with seat M, there being an extension 30 below the portion 29.

With the guide means and valve assembled,

as shown in Figures 4 and 5. the assembly is pressed into an opening until the lower ends of ribs 2| abut shoulder l3, the ribs closely en- 7 gaging the walls of the opening so that the assembly is frictionally maintained in coaxial relation with seat |4 against which the valve 26 is pressed by the spring 25. In this relation of parts, the extension 30 projects below seat M, which terminates somewhat above the lower face of block l0 so as to provide a seat of adequate strength, so that the closed end of the head 21 is substantially flush with the bottom surface of the block. In this manner, a substantially flat upper boundary is provided for the compression chamber. The top of the guide unit is substantially flush with the top face of the block I0.

Reference numeral 3| designates a circular cap plate which, as here shown, has integral therewith five tubular members 32 in the form of inverted frusta. Also depending from the plate are four legs'in the form of web-s 33 whose lower ends are all in the same plane with the lower ends of elements 32. As here shown, the cap 3| is secured on top of block H) by means of four cap screws 34, and with the parts thus associated, the passages 32' of elements 32 are in register with the breather holes 23 of the valve guiding units, these passages being continued through the cap plate 3|.

Reference numeral 35 designates a cylinder provided with a shoulder 36 on which block Ill rests. The cylinder is provided with a cover plate 31 between which and cap plate 3| a compression spring 38 is interposed, the lower end of the spring being centered by an annular rib drical skirt 28 which is received with a close in dependence upon the size of the breather Long-life precision operation of the valves is contributed by the imperforate sliding and duplicate guiding surfaces.

It will be understood thatdepending on xthe capacity of the compressor, one or more valves may be utilized under the invention,- and 'five have been shown here merely by way of example. Also it will be understood that the inventin -is .not necessarilyelimited .to the described details of cons'truction, and consequently I .do not limit myself in th'ese matters except as in the following claims.

I claim:

1. Compressor'outlet valve structure comprising a cage, said cage comprisingia block having.

a through opening, a valveseat on said block.

at one end of said opening,,alvalve.guideuunit in said'opening behind said seat, said guide unit comprisingfnested inner and "outer cylindrical members separablysecured "together in concentric" relation with a narrow annular space between them, and axially extending ribs on the outside of said outer member frictionally engaging the walls of said opening to maintain said unit coaxial with said seat; and a cup-shaped valve having a head portion cooperable with said seat and having a cylindrical skirt portion slidably guided in said annular space.

2. Apparatus according to claim 1 wherein said seat is extended to provide an abutment surface for the adjacent ends of said ribs, which ends project beyond the cylindrical portion of said outer member.

3.'-In combination, a cage comprising a block having a through opening, a valve seat on said blocklat one end of said opening, valve guide means in said opening behind said seat, abutment means limiting insertion of said guide means toward said seat, said guide means includinga wall remote from said seat having a breather hole; a valve cooperating with said seat andfhaving a portion guided by said guide means, movements. of said valve causing breathing through said hole; and means for holdingsaid guide means against said abutment means, said holding means comprising a cap member, a tubular compression member extending between said cap member and said guide member and connecting said hole with an aperture in said cap;.and means maintaining said members in operative association.

JOSEPH FRANK K OWACZ. 

